From c2dcbe0f25a3e8bd60a4ccf377bbdd47f4794871 Mon Sep 17 00:00:00 2001
From: Louis Pilfold <louis@lpil.uk>
Date: Tue, 26 Mar 2024 13:57:31 +0000
Subject: Document opaque types

Closes https://github.com/gleam-lang/language-tour/issues/63
---
 .../lesson00_use/code.gleam                        | 38 ----------------------
 .../lesson00_use/en.html                           | 31 ------------------
 2 files changed, 69 deletions(-)
 delete mode 100644 src/content/chapter5_advanced_features/lesson00_use/code.gleam
 delete mode 100644 src/content/chapter5_advanced_features/lesson00_use/en.html

(limited to 'src/content/chapter5_advanced_features/lesson00_use')

diff --git a/src/content/chapter5_advanced_features/lesson00_use/code.gleam b/src/content/chapter5_advanced_features/lesson00_use/code.gleam
deleted file mode 100644
index e7b435b..0000000
--- a/src/content/chapter5_advanced_features/lesson00_use/code.gleam
+++ /dev/null
@@ -1,38 +0,0 @@
-import gleam/io
-import gleam/result
-
-pub fn main() {
-  io.debug(without_use())
-  io.debug(with_use())
-}
-
-pub fn without_use() {
-  result.try(get_username(), fn(username) {
-    result.try(get_password(), fn(password) {
-      result.map(log_in(username, password), fn(greeting) {
-        greeting <> ", " <> username
-      })
-    })
-  })
-}
-
-pub fn with_use() {
-  use username <- result.try(get_username())
-  use password <- result.try(get_password())
-  use greeting <- result.map(log_in(username, password))
-  greeting <> ", " <> username
-}
-
-// Here are some pretend functions for this example:
-
-fn get_username() {
-  Ok("alice")
-}
-
-fn get_password() {
-  Ok("hunter2")
-}
-
-fn log_in(_username: String, _password: String) {
-  Ok("Welcome")
-}
diff --git a/src/content/chapter5_advanced_features/lesson00_use/en.html b/src/content/chapter5_advanced_features/lesson00_use/en.html
deleted file mode 100644
index b8e2641..0000000
--- a/src/content/chapter5_advanced_features/lesson00_use/en.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<p>
-  Gleam lacks exceptions, macros, type classes, early returns, and a variety of
-  other features, instead going all-in with just first-class-functions and
-  pattern matching. This makes Gleam code easier to understand, but it can
-  sometimes result in excessive indentation.
-</p>
-<p>
-  Gleam's use expression helps out here by enabling us to write code that uses
-  callbacks in an unindented style, as shown in the code window.
-</p>
-
-<p>
-  The higher order function being called goes on the right hand side of the
-  <code>&lt;-</code> operator. It must take a callback function as its final
-  argument.
-</p>
-<p>
-  The argument names for the callback function go on the left hand side of the
-  <code>&lt;-</code> operator. The function can take any number of arguments,
-  including zero.
-</p>
-<p>
-  All the remaining code in the enclosing <code class="hljs">{}</code> block
-  becomes the body of the callback function.
-</p>
-<p>
-  This is a very capable and useful feature, but excessive application of
-  <code>use</code> may result in code that is unclear otherwise, especially to
-  beginners. Often using the regular function call syntax will result in more
-  approachable code!
-</p>
-- 
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